6419e189a4
Currently, each backend has it's own function to verify whether the object vtable pointer is the expected one. All these functions can be removed in favor of a single isintance function in the base class, which takes the expected vtable pointer as a parameter. Functions which are called through the vtable, don't need to verify the vtable pointer, and those checks are removed.
246 lines
6.6 KiB
C
246 lines
6.6 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2010 Jef Driesen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <libdivecomputer/mares_iconhd.h>
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#include "context-private.h"
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#include "parser-private.h"
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#include "array.h"
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#define ISINSTANCE(parser) dc_parser_isinstance((parser), &mares_iconhd_parser_vtable)
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#define ICONHD 0x14
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#define ICONHDNET 0x15
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typedef struct mares_iconhd_parser_t mares_iconhd_parser_t;
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struct mares_iconhd_parser_t {
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dc_parser_t base;
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unsigned int model;
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};
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static dc_status_t mares_iconhd_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
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static dc_status_t mares_iconhd_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
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static dc_status_t mares_iconhd_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value);
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static dc_status_t mares_iconhd_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
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static dc_status_t mares_iconhd_parser_destroy (dc_parser_t *abstract);
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static const dc_parser_vtable_t mares_iconhd_parser_vtable = {
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DC_FAMILY_MARES_ICONHD,
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mares_iconhd_parser_set_data, /* set_data */
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mares_iconhd_parser_get_datetime, /* datetime */
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mares_iconhd_parser_get_field, /* fields */
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mares_iconhd_parser_samples_foreach, /* samples_foreach */
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mares_iconhd_parser_destroy /* destroy */
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};
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dc_status_t
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mares_iconhd_parser_create (dc_parser_t **out, dc_context_t *context, unsigned int model)
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{
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if (out == NULL)
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return DC_STATUS_INVALIDARGS;
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// Allocate memory.
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mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) malloc (sizeof (mares_iconhd_parser_t));
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if (parser == NULL) {
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ERROR (context, "Failed to allocate memory.");
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return DC_STATUS_NOMEMORY;
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}
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// Initialize the base class.
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parser_init (&parser->base, context, &mares_iconhd_parser_vtable);
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// Set the default values.
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parser->model = model;
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*out = (dc_parser_t*) parser;
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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mares_iconhd_parser_destroy (dc_parser_t *abstract)
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{
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// Free memory.
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free (abstract);
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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mares_iconhd_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
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{
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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mares_iconhd_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
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{
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mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) abstract;
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unsigned int header = 0x5C;
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if (parser->model == ICONHDNET) {
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header = 0x80;
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}
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if (abstract->size < 4)
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return DC_STATUS_DATAFORMAT;
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unsigned int length = array_uint32_le (abstract->data);
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if (abstract->size < length || length < header + 4)
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return DC_STATUS_DATAFORMAT;
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const unsigned char *p = abstract->data + length - header + 6;
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if (datetime) {
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datetime->hour = array_uint16_le (p + 0);
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datetime->minute = array_uint16_le (p + 2);
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datetime->second = 0;
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datetime->day = array_uint16_le (p + 4);
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datetime->month = array_uint16_le (p + 6) + 1;
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datetime->year = array_uint16_le (p + 8) + 1900;
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}
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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mares_iconhd_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value)
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{
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mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) abstract;
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unsigned int header = 0x5C;
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if (parser->model == ICONHDNET) {
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header = 0x80;
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}
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if (abstract->size < 4)
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return DC_STATUS_DATAFORMAT;
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unsigned int length = array_uint32_le (abstract->data);
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if (abstract->size < length || length < header + 4)
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return DC_STATUS_DATAFORMAT;
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const unsigned char *p = abstract->data + length - header;
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dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
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if (value) {
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switch (type) {
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case DC_FIELD_DIVETIME:
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*((unsigned int *) value) = array_uint16_le (p + 0x02) * 5;
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break;
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case DC_FIELD_MAXDEPTH:
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*((double *) value) = array_uint16_le (p + 0x04) / 10.0;
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break;
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case DC_FIELD_GASMIX_COUNT:
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*((unsigned int *) value) = 3;
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break;
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case DC_FIELD_GASMIX:
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gasmix->helium = 0.0;
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gasmix->oxygen = p[0x14 + flags * 4] / 100.0;
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gasmix->nitrogen = 1.0 - gasmix->oxygen - gasmix->helium;
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break;
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default:
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return DC_STATUS_UNSUPPORTED;
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}
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}
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return DC_STATUS_SUCCESS;
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}
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static dc_status_t
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mares_iconhd_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
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{
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mares_iconhd_parser_t *parser = (mares_iconhd_parser_t *) abstract;
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unsigned int header = 0x5C;
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unsigned int samplesize = 8;
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if (parser->model == ICONHDNET) {
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header = 0x80;
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samplesize = 12;
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}
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if (abstract->size < 4)
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return DC_STATUS_DATAFORMAT;
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unsigned int length = array_uint32_le (abstract->data);
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if (abstract->size < length || length < header + 4)
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return DC_STATUS_DATAFORMAT;
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const unsigned char *data = abstract->data;
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unsigned int size = length - header;
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unsigned int time = 0;
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unsigned int interval = 5;
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unsigned int offset = 4;
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unsigned int nsamples = 0;
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while (offset + samplesize <= size) {
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dc_sample_value_t sample = {0};
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// Time (seconds).
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time += interval;
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sample.time = time;
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if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
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// Depth (1/10 m).
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unsigned int depth = array_uint16_le (data + offset + 0);
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sample.depth = depth / 10.0;
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if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
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// Temperature (1/10 °C).
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unsigned int temperature = array_uint16_le (data + offset + 2);
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sample.temperature = temperature / 10.0;
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if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
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offset += samplesize;
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nsamples++;
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// Some extra data.
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if (parser->model == ICONHDNET && (nsamples % 4) == 0) {
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if (offset + 8 > size)
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return DC_STATUS_DATAFORMAT;
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// Pressure (1/100 bar).
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unsigned int pressure = array_uint16_le(data + offset);
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sample.pressure.tank = 0;
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sample.pressure.value = pressure / 100.0;
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if (callback) callback (DC_SAMPLE_PRESSURE, sample, userdata);
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offset += 8;
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}
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}
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return DC_STATUS_SUCCESS;
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}
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